Catalyst for methane and carbon dioxide dry reforming reaction as well as preparation method and application of catalyst

Abstract

The invention provides a catalyst for methane and carbon dioxide dry reforming reaction as well as a preparation method and application thereof, and relates to the technical field of catalyst preparation. The catalyst for the methane and carbon dioxide dry reforming reaction is prepared by the following steps: taking boric acid, nickel nitrate, magnesium nitrate and aluminum nitrate as raw materials, dissolving the raw materials in water, and stirring until the raw materials are clear and transparent to obtain a mixed solution; adding an ammonia water solution into the mixed solution and stirring to obtain a precipitate mixture; placing the precipitate mixture in a hydrothermal reactor for hydrothermal reaction, and obtaining a catalyst precursor after the hydrothermal reaction is finished; filtering, washing and drying the catalyst precursor to obtain a dried product; and the dried product is calcined and cooled, and the Ni-B / MgAl2O4 catalyst is obtained. The catalyst prepared by the method provided by the invention can overcome inactivation caused by easy generation of carbon deposition in the existing Ni catalyst, and provides high methane and carbon dioxide dry reforming reaction activity and stability at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of catalyst preparation, and in particular to a method for preparing a catalyst for methane and carbon dioxide dry reforming reaction. Background Art

[0002] The increasing concentration of carbon dioxide (CO2) is one of the major drivers of the greenhouse effect. By using CO2 as a starting material to synthesize a variety of chemicals, its content in the atmosphere can be effectively reduced. Among the various approaches to exploring CO2 conversion applications, dry reforming of methane (DRM) technology for producing synthesis gas occupies an extremely critical position. The synthesis gas produced by DRM technology has a carbon monoxide to hydrogen ratio of nearly one to one. This unique composition enables it to be directly applied to multiple fields such as Fischer-Tropsch synthesis, methanol synthesis, and ammonia synthesis, thereby producing high-value-added products and generating considerable economic returns.

[0003] However, the main obstacle currently hindering the large-scale industrial application of methane dry reforming technology is the degradation of catalyst performance due to sintering and carbon deposition. Therefore, in the DRM process, how to balance the catalyst's cost-effectiveness, activity, selectivity, and stability has become a core challenge that needs to be overcome. Summary of the Invention

[0004] The present invention provides a method for preparing a catalyst for methane and carbon dioxide dry reforming reaction, which mainly comprises:

[0005] Obtain boric acid, nickel nitrate, magnesium nitrate, and aluminum nitrate as raw materials, dissolve the raw materials in water, and stir until clear and transparent to obtain a mixed solution;

[0006] adding an aqueous ammonia solution to the mixed solution and stirring to obtain a precipitated mixture;

[0007] placing the precipitated mixture in a hydrothermal reactor for hydrothermal reaction, filtering, separating, washing, and drying the mixture after the reaction to obtain a catalyst precursor;

[0008] filtering, washing and drying the catalyst precursor to obtain a dry product;

[0009] The dried product is calcined and cooled to obtain a Ni-B / MgAl2O4 catalyst.

[0010] Furthermore, boric acid, nickel nitrate, magnesium nitrate and aluminum nitrate are obtained as raw materials, specifically: magnesium nitrate and aluminum nitrate are used as carrier precursors, nickel nitrate is used as an active metal precursor, and boric acid is used as an auxiliary agent precursor, wherein the mass fraction of Ni is 3% to 10%, the mass fraction of B is 0.05% to 0.5%, and the molar ratio of Mg / Al is 1:2.

[0011] Furthermore, the mass fraction of B is 0.08% to 0.2%.

[0012] Furthermore, the step of adding an aqueous ammonia solution to the mixed solution and stirring to obtain a precipitated mixture comprises:

[0013] An ammonia solution is added to the mixed solution, wherein the molar ratio of ammonia ions in the ammonia solution to metal ions in the mixed solution is 1:3 to 2:1, and the mixture is stirred and mixed to uniformly distribute the substances, causing a precipitation reaction to obtain the precipitation mixture, wherein the metal ions include magnesium ions, aluminum ions and nickel ions.

[0014] Furthermore, the precipitation mixture is placed in a hydrothermal reactor for hydrothermal reaction, and the mixture after the reaction is completed is filtered, separated, washed, and dried to obtain a catalyst precursor, including:

[0015] The precipitation mixture is transferred to a hydrothermal reactor and reacted at a hydrothermal temperature of 180° C. to 240° C. for 12 to 30 hours to generate a catalyst precursor.

[0016] Furthermore, filtering, washing and drying the catalyst precursor to obtain a dry product comprises:

[0017] The catalyst precursor was taken out from the hydrothermal reactor, and a solid product was separated by filtration. The solid product was washed with deionized water and ethanol in sequence to remove residual impurities. The solid product was dried at 80° C. to obtain the dried product.

[0018] Furthermore, the dried product is calcined to obtain a Ni-B / MgAl2O4 catalyst, comprising:

[0019] The dried product is placed in a calcination device, heated to 300° C. to 600° C., calcined at the temperature, and slowly cooled to room temperature after calcination to obtain the Ni—B / MgAl 2 O 4 catalyst.

[0020] Furthermore, the dried product is placed in a calcination device, heated to 300° C. to 600° C., calcined at the temperature, and slowly cooled to room temperature after calcination to obtain the Ni-B / MgAl2O4 catalyst, comprising:

[0021] The dried product is placed in a calcination device, heated to 300° C. to 600° C. at a heating rate of 1° C. / min to 8° C. / min, calcined at this temperature for 2 to 6 hours, and slowly cooled to room temperature after calcination to obtain the Ni-B / MgAl 2 O 4 catalyst.

[0022] The present invention provides a catalyst prepared by a catalyst preparation method for methane and carbon dioxide dry reforming reaction.

[0023] The present invention provides an application of a catalyst preparation method for a methane-carbon dioxide dry reforming reaction in catalyst preparation.

[0024] The technical solution provided by the embodiment of the present invention may have the following beneficial effects:

[0025] The present invention discloses a method for preparing a catalyst for a methane-carbon dioxide dry reforming reaction. The catalyst prepared by the present invention can overcome the deactivation of existing Ni catalysts due to the easy generation of carbon deposits, while providing higher methane-carbon dioxide dry reforming reaction activity and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The present invention is a flow chart of a method for preparing a catalyst for methane and carbon dioxide dry reforming reaction.

[0027] Figure 2 This is a graph showing the change in CH4 conversion rate over time within 74 hours for the implementation operation of the present invention, a Ni-B / MgAl2O4-1, and the comparison operation, a Ni / MgAl2O4 catalyst.

[0028] Figure 3 This is a graph showing the change in CO2 conversion rate over time within 74 hours for the implementation operation of the present invention, a Ni-B / MgAl2O4-1, and the comparison operation, a Ni / MgAl2O4 catalyst. DETAILED DESCRIPTION

[0029] To help those skilled in the art better understand the technical solutions in this specification, the following will provide a clear and complete description of the technical solutions in the embodiments of this specification, in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of this specification, not all of them. All other embodiments derived by those skilled in the art based on the embodiments in this specification without creative effort shall fall within the scope of protection of this specification.

[0030] like Figure 1 In this embodiment, a method for preparing a catalyst for methane and carbon dioxide dry reforming reaction may specifically include:

[0031] Step S101: Obtain boric acid, nickel nitrate, magnesium nitrate, and aluminum nitrate as raw materials, dissolve the raw materials in water, and stir until clear and transparent to obtain a mixed solution.

[0032] Here, boric acid, nickel nitrate, magnesium nitrate and aluminum nitrate are obtained as raw materials, specifically: magnesium nitrate and aluminum nitrate are used as carrier precursors, nickel nitrate is used as an active metal precursor, and boric acid is used as an auxiliary agent precursor, wherein the mass fraction of Ni is 3% to 10%, the mass fraction of B is 0.05% to 0.5%, preferably, the mass fraction of B is 0.08% to 0.2%, and the molar ratio of Mg / Al is 1:2.

[0033] Step S102: adding an ammonia solution to the mixed solution and stirring to obtain a precipitated mixture.

[0034] Here, the method includes: adding an ammonia solution to the mixed solution, wherein the molar ratio of ammonia ions in the ammonia solution to metal ions in the mixed solution is 1:3 to 2:1, stirring and mixing to uniformly distribute the substances, causing a precipitation reaction, and obtaining the precipitation mixture, wherein the metal ions include magnesium ions, aluminum ions and nickel ions.

[0035] Step S103: placing the precipitation mixture in a hydrothermal reactor for hydrothermal reaction, filtering, separating, washing, and drying the mixture after the reaction to obtain a catalyst precursor.

[0036] Here, the process includes: transferring the precipitation mixture to a hydrothermal reactor, reacting at a hydrothermal temperature of 180° C. to 240° C., and continuing the reaction for 12 hours to 30 hours to generate a catalyst precursor.

[0037] Step S104: filtering, washing and drying the catalyst precursor to obtain a dry product.

[0038] Specifically, the catalyst precursor is taken out from the hydrothermal reactor, the solid product is separated by filtration, the solid product is washed with deionized water and ethanol in sequence to remove residual impurities, and the solid product is dried at a temperature of 80° C. to obtain the dried product.

[0039] Step S105: calcining the dried product and cooling it to obtain a Ni-B / MgAl2O4 catalyst.

[0040] Here, the process includes placing the dried product in a calcination device, heating it to 300° C. to 600° C., calcining it at the temperature, and slowly cooling it to room temperature after the calcination is completed to obtain the Ni—B / MgAl 2 O 4 catalyst.

[0041] Specifically, the dried product is placed in a calcination device, heated to 300°C to 600°C at a heating rate of 1°C / min to 8°C / min, calcined at this temperature for 2 hours to 6 hours, and slowly cooled to room temperature after calcination to obtain the Ni-B / MgAl2O4 catalyst.

[0042] The present invention provides a catalyst prepared by a catalyst preparation method for methane and carbon dioxide dry reforming reaction.

[0043] The present invention provides an application of a catalyst preparation method for a methane-carbon dioxide dry reforming reaction in catalyst preparation.

[0044] The following multiple sets of actual operations are further explained to illustrate the catalyst preparation method for the methane carbon dioxide dry reforming reaction of the present invention:

[0045] Implementation Operation 1

[0046] Weigh 0.06g of boric acid, 0.26g of nickel nitrate hexahydrate, 1.80g of magnesium nitrate hexahydrate, and 2.99g of aluminum nitrate nonahydrate and dissolve them in 60mL of distilled water. Stir rapidly until the solution is clear and transparent. Add 2.1mL of 25%-28% concentrated ammonia solution dropwise to the stirred mixture of boric acid, nickel nitrate hexahydrate, magnesium nitrate hexahydrate, and aluminum nitrate nonahydrate, and continue stirring for approximately 40 minutes. Once stirring is complete, transfer the mixture to a 100mL hydrothermal autoclave, set the temperature to 200°C, and react for 20 hours. After the reaction is complete, wash the product three times with 500mL of deionized water and then three times with 250mL of ethanol. Dry the sample in a forced-air drying oven at 80°C for 10 hours. Remove the dried sample, grind it into a powder, and calcine it in a muffle furnace at 500°C for 3 hours to obtain Ni-B / MgAl2O4. The mass fraction of Ni is 5%, and the mass fraction of B is 0.1%, which is recorded as Ni-B / MgAl2O4-1 catalyst.

[0047] Implementation Operation 2

[0048] Weigh 0.03g of boric acid, 0.26g of nickel nitrate hexahydrate, 1.80g of magnesium nitrate hexahydrate, and 2.99g of aluminum nitrate nonahydrate and dissolve them in 60mL of distilled water. Stir rapidly until the solution is clear and transparent. Add 2.1mL of 25-28% concentrated ammonia solution dropwise to the stirred mixture of boric acid, nickel nitrate hexahydrate, magnesium nitrate hexahydrate, and aluminum nitrate nonahydrate, and continue stirring for approximately 40 minutes. Once stirring is complete, transfer the mixture to a 100mL hydrothermal autoclave, set the temperature to 200°C, and react for 20 hours. After the reaction is complete, wash the product three times with 500mL of deionized water and then three times with 250mL of ethanol. Dry the sample in a forced-air drying oven at 80°C for 10 hours. Remove the dried sample, grind it into a powder, and calcine it in a muffle furnace at 500°C for 3 hours to obtain Ni-B / MgAl2O4. The mass fraction of Ni is 5%, and the mass fraction of B is 0.05%, which is recorded as Ni-B / MgAl2O4-2 catalyst.

[0049] Implementation Operation Three

[0050] Weigh 0.12g of boric acid, 0.26g of nickel nitrate hexahydrate, 1.80g of magnesium nitrate hexahydrate, and 2.99g of aluminum nitrate nonahydrate and dissolve them in 60mL of distilled water. Stir rapidly until the solution is clear and transparent. Add 2.1mL of 25-28% concentrated ammonia solution dropwise to the stirred mixture of boric acid, nickel nitrate hexahydrate, magnesium nitrate hexahydrate, and aluminum nitrate nonahydrate, and continue stirring for approximately 40 minutes. Once stirring is complete, transfer the mixture to a 100mL hydrothermal autoclave, set the temperature to 200°C, and react for 20 hours. After the reaction is complete, wash the product three times with 500mL of deionized water and then three times with 250mL of ethanol. Dry the sample in a forced-air drying oven at 80°C for 10 hours. Remove the dried sample, grind it into a powder, and calcine it in a muffle furnace at 500°C for 3 hours to obtain Ni-B / MgAl2O4. The mass fraction of Ni is 5%, and the mass fraction of B is 0.5%, which is recorded as Ni-B / MgAl2O4-3 catalyst.

[0051] Implementation Operation 4

[0052] Weigh 0.06g of boric acid, 0.26g of nickel nitrate hexahydrate, 1.80g of magnesium nitrate hexahydrate, and 2.99g of aluminum nitrate nonahydrate and dissolve them in 60mL of distilled water. Stir rapidly until the solution is clear and transparent. Add 2.1mL of 25-28% concentrated ammonia solution dropwise to the stirred mixture of boric acid, nickel nitrate hexahydrate, magnesium nitrate hexahydrate, and aluminum nitrate nonahydrate, and continue stirring for approximately 40 minutes. Once stirring is complete, transfer the mixture to a 100mL hydrothermal autoclave, set the temperature to 180°C, and react for 20 hours. After the reaction is complete, wash the product three times with 500mL of deionized water and then three times with 250mL of ethanol. Dry the sample in a forced-air drying oven at 80°C for 10 hours. Remove the dried sample, grind it into a powder, and calcine it in a muffle furnace at 500°C for 3 hours to obtain Ni-B / MgAl2O4. The mass fraction of Ni is 5%, and the mass fraction of B is 0.1%, which is recorded as Ni-B / MgAl2O4-4 catalyst.

[0053] Implementation Operation 5

[0054] Weigh 0.06g of boric acid, 0.26g of nickel nitrate hexahydrate, 1.80g of magnesium nitrate hexahydrate, and 2.99g of aluminum nitrate nonahydrate and dissolve them in 60mL of distilled water. Stir rapidly until the solution is clear and transparent. Add 2.1mL of 25-28% concentrated ammonia solution dropwise to the stirred mixture of boric acid, nickel nitrate hexahydrate, magnesium nitrate hexahydrate, and aluminum nitrate nonahydrate, and continue stirring for approximately 40 minutes. Once stirring is complete, transfer the mixture to a 100mL hydrothermal autoclave, set the temperature to 240°C, and react for 20 hours. After the reaction is complete, wash the product three times with 500mL of deionized water and then three times with 250mL of ethanol. Dry the sample in a forced-air drying oven at 80°C for 10 hours. Remove the dried sample, grind it into a powder, and calcine it in a muffle furnace at 500°C for 3 hours to obtain Ni-B / MgAl2O4. The mass fraction of Ni is 5%, and the mass fraction of B is 0.1%, which is recorded as Ni-B / MgAl2O4-5 catalyst.

[0055] Comparison operation 1

[0056] Weigh 0.26g of nickel nitrate hexahydrate, 1.80g of magnesium nitrate hexahydrate, and 2.99g of aluminum nitrate nonahydrate and dissolve them in 60mL of distilled water. Stir rapidly until the solution is clear and transparent. Add 2.1mL of 25-28% concentrated ammonia solution dropwise to the stirred mixture of nickel nitrate hexahydrate, magnesium nitrate hexahydrate, and aluminum nitrate nonahydrate, and continue stirring for approximately 40 minutes. Once stirring is complete, transfer the mixture to a 100mL hydrothermal autoclave, set the temperature to 200°C, and react for 20 hours. After the reaction is complete, wash the product three times with 500mL of deionized water and then three times with 250mL of ethanol. Dry the sample in an 80°C forced air drying oven for 10 hours. Remove the dried sample, grind it into a powder, and calcine it in a muffle furnace at 500°C for 3 hours to obtain Ni / MgAl2O4. The mass fraction of Ni is 5%, and this is designated as Ni / MgAl2O4 catalyst.

[0057] Comparison Operation 2

[0058] Weigh 0.18g of boric acid, 0.26g of nickel nitrate hexahydrate, 1.80g of magnesium nitrate hexahydrate, and 2.99g of aluminum nitrate nonahydrate and dissolve them in 60mL of distilled water. Stir rapidly until the solution is clear and transparent. Add 2.1mL of 25-28% concentrated ammonia solution dropwise to the stirred mixture of boric acid, nickel nitrate hexahydrate, magnesium nitrate hexahydrate, and aluminum nitrate nonahydrate, and continue stirring for approximately 40 minutes. Once stirring is complete, transfer the mixture to a 100mL hydrothermal autoclave, set the temperature to 200°C, and react for 20 hours. After the reaction is complete, wash the product three times with 500mL of deionized water and then three times with 250mL of ethanol. Dry the sample in a forced-air drying oven at 80°C for 10 hours. Remove the dried sample, grind it into a powder, and calcine it in a muffle furnace at 500°C for 3 hours to obtain Ni-B / MgAl2O4. The mass fraction of Ni is 5%, and the mass fraction of B is 0.7%, which is recorded as Ni-B / MgAl2O4-6 catalyst.

[0059] Comparison Operation 3

[0060] Weigh 0.06g of boric acid, 0.26g of nickel nitrate hexahydrate, 1.80g of magnesium nitrate hexahydrate, and 2.99g of aluminum nitrate nonahydrate and dissolve them in 60mL of distilled water. Stir rapidly until the solution is clear and transparent. Add 2.1mL of 25-28% concentrated ammonia solution dropwise to the stirred mixture of boric acid, nickel nitrate hexahydrate, magnesium nitrate hexahydrate, and aluminum nitrate nonahydrate, and continue stirring for approximately 40 minutes. Once stirring is complete, transfer the mixture to a 100mL hydrothermal autoclave, set the temperature to 160°C, and react for 20 hours. After the reaction is complete, wash the product three times with 500mL of deionized water and then three times with 250mL of ethanol. Dry the sample in an 80°C forced air drying oven for 10 hours. Remove the dried sample, grind it into a powder, and calcine it in a muffle furnace at 500°C for 3 hours to obtain Ni-B / MgAl2O4. The mass fraction of Ni is 5%, and the mass fraction of B is 0.1%, which is recorded as Ni-B / MgAl2O4-7 catalyst.

[0061] Comparison Operation 4

[0062] Weigh 0.06g of boric acid, 0.26g of nickel nitrate hexahydrate, 1.80g of magnesium nitrate hexahydrate, and 2.99g of aluminum nitrate nonahydrate and dissolve them in 60mL of distilled water. Stir rapidly until the solution is clear and transparent. Add 2.1mL of 25-28% concentrated ammonia solution dropwise to the stirred mixture of boric acid, nickel nitrate hexahydrate, magnesium nitrate hexahydrate, and aluminum nitrate nonahydrate, and continue stirring for approximately 40 minutes. Once stirring is complete, transfer the mixture to a 100mL hydrothermal autoclave, set the temperature to 260°C, and react for 20 hours. After the reaction is complete, wash the product three times with 500mL of deionized water and then three times with 250mL of ethanol. Dry the sample in a forced-air drying oven at 80°C for 10 hours. Remove the dried sample, grind it into a powder, and calcine it in a muffle furnace at 500°C for 3 hours to obtain Ni-B / MgAl2O4. The mass fraction of Ni is 5%, and the mass fraction of B is 0.1%, which is recorded as Ni-B / MgAl2O4-8 catalyst.

[0063] The above-mentioned implementation operations 1 to 5 and comparison operations 1 to 4 were used to test the methane carbon dioxide dry reforming reaction performance.

[0064] The reaction conditions were as follows: reaction temperature of 800 °C, reaction pressure of 0.1 MPa, catalyst mass of 0.1 g, CH4 and CO2 volume ratio of 1:1 in the reaction feed gas, total flow rate of CH4 and CO2 gas of 150 mL / min, and space velocity (GHSV) of 90000 mL·h -1 ·g cat -1 .

[0065] The catalyst was tableted, crushed, and sieved (40-80 mesh). 0.1g of the catalyst was weighed and mixed with an equal mass of quartz sand. The mixture was then placed into a quartz reaction tube with an inner diameter of 6mm. The reaction feed gas was introduced, and the peak area values ​​of each reactant before the reaction were analyzed by gas chromatography. The reaction gas was then purged with nitrogen and switched to hydrogen. The temperature was then raised to 800°C under a hydrogen atmosphere, and the catalyst was reduced for 2 hours.

[0066] The hydrogen was purged with nitrogen at 800°C, and the reaction was switched to the reaction raw gas for reaction. The composition and content of the tail gas at different reaction times were collected online by gas chromatograph and calculated and analyzed.

[0067] After the reaction is completed, the reaction raw gas is switched to nitrogen, heating is stopped, and the temperature is naturally cooled. The calculation formulas for CH4 conversion rate XCH4 and CO2 conversion rate XCO2 are as follows:

[0068]

[0069] The test results are shown in Table 1.

[0070] Table 1 Performance of methane-CO2 dry reforming over different Ni-B / MgAl2O4 catalysts

[0071]

[0072]

[0073] Analysis of the data in Table 1 shows that as the boron mass fraction increases from 0% to 0.7%, the initial conversions of CH₄ and CO₂, as well as the stability of the Ni-B / MgAl₂O₄ catalyst, first increase and then decrease. All three indicators reach their peak values ​​at a boron mass fraction of 0.1%.

[0074] In particular, the initial conversions of CH4 and CO2 over the Ni-B / MgAl2O4-1 catalyst reached 98.6% and 98.8%, respectively. After 74 hours of reaction, the conversions remained at high levels of 98.4% and 97.7%, with little decrease in activity and almost no catalyst deactivation, demonstrating the excellent activity and stability of Ni-B / MgAl2O4-1 in methane dry reforming.

[0075] In the range of boron mass fraction from 0.05% to 0.5%, the Ni-B / MgAl2O4 catalyst maintained a high methane dry reforming activity throughout the reaction process, effectively slowing down the decline rate of methane and carbon dioxide conversion rates.

[0076] After 74 hours of reaction, the CH4 and CO2 conversions of the Ni / MgAl2O4 catalyst without B addition rapidly decreased by 9.2% and 11.9%, respectively. When the B content was too low, the catalyst stability was not significantly improved. However, when the B content was too high, the initial CH4 and CO2 conversions dropped significantly below 90%. For Ni-B / MgAl2O4 catalysts with an appropriate amount of B (0.05% to 0.5%), the initial CH4 and CO2 conversions were both above 97%, and the CH4 and CO2 conversions decreased by no more than 2.5% after 74 hours of reaction. The appropriate amount of B not only significantly improved the stability of the Ni catalyst for methane dry reforming but also improved the reaction activity. The presence of B facilitates the formation of Ni-B species along the metallic Ni, controls particle size, stabilizes the Ni metal state, and influences Ni-C interactions, thereby improving catalytic performance and reducing deactivation rates.

[0077] In summary, the Ni-B / MgAl2O4 catalyst obtained according to the preparation method of the present invention, when only a small amount of B is introduced, can not only maintain or even improve the activity of the Ni catalyst and maintain high conversion rates of methane and carbon dioxide, but also significantly slow down the decline rate of the conversion rates of these two gases, so that the catalyst maintains a very high methane dry reforming reaction activity for a long time, thereby improving the stability and service life of the Ni catalyst.

[0078] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. In addition, the various different embodiments of the present invention can also be arbitrarily combined, as long as they do not violate the concept of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A method for preparing a catalyst for methane and carbon dioxide dry reforming reaction, characterized in that: include: Obtain boric acid, nickel nitrate, magnesium nitrate, and aluminum nitrate as raw materials, dissolve the raw materials in water, and stir until clear and transparent to obtain a mixed solution; adding an aqueous ammonia solution to the mixed solution and stirring to obtain a precipitated mixture; placing the precipitated mixture in a hydrothermal reactor for hydrothermal reaction, filtering, separating, washing, and drying the mixture after the reaction to obtain a catalyst precursor; filtering, washing and drying the catalyst precursor to obtain a dry product; The dried product is calcined and cooled to obtain a Ni-B / MgAl2O4 catalyst.

2. The method for preparing a catalyst for methane carbon dioxide dry reforming reaction according to claim 1, wherein: Boric acid, nickel nitrate, magnesium nitrate and aluminum nitrate are obtained as raw materials, specifically: magnesium nitrate and aluminum nitrate are used as carrier precursors, nickel nitrate is used as an active metal precursor, and boric acid is used as an auxiliary agent precursor, wherein the mass fraction of Ni is 3% to 10%, the mass fraction of B is 0.05% to 0.5%, and the molar ratio of Mg / Al is 1:

2.

3. The method for preparing a catalyst for methane carbon dioxide dry reforming reaction according to claim 1, wherein: The mass fraction of B is 0.08% to 0.2%.

4. The method for preparing a catalyst for methane carbon dioxide dry reforming reaction according to claim 1, wherein: The step of adding an aqueous ammonia solution to the mixed solution and stirring to obtain a precipitated mixture comprises: An ammonia solution is added to the mixed solution, wherein the molar ratio of ammonia ions in the ammonia solution to metal ions in the mixed solution is 1:3 to 2:1, and the mixture is stirred and mixed to uniformly distribute the substances, causing a precipitation reaction to obtain the precipitation mixture, wherein the metal ions include magnesium ions, aluminum ions and nickel ions.

5. The method for preparing a catalyst for methane and carbon dioxide dry reforming reaction according to claim 1, wherein: The precipitated mixture is placed in a hydrothermal reactor for hydrothermal reaction, and the mixture after the reaction is completed is filtered, separated, washed, and dried to obtain a catalyst precursor, comprising: The precipitation mixture is transferred to a hydrothermal reactor and reacted at a hydrothermal temperature of 180° C. to 240° C. for 12 to 30 hours to generate a catalyst precursor.

6. The method for preparing a catalyst for methane and carbon dioxide dry reforming reaction according to claim 1, wherein: The step of filtering, washing and drying the catalyst precursor to obtain a dry product comprises: The catalyst precursor was taken out from the hydrothermal reactor, and a solid product was separated by filtration. The solid product was washed with deionized water and ethanol in sequence to remove residual impurities. The solid product was dried at 80° C. to obtain the dried product.

7. The method for preparing a catalyst for methane and carbon dioxide dry reforming reaction according to claim 1, wherein: The dried product is calcined to obtain a Ni-B / MgAl2O4 catalyst, comprising: The dried product is placed in a calcination device, heated to 300° C. to 600° C., calcined at the temperature, and slowly cooled to room temperature after calcination to obtain the Ni—B / MgAl 2 O 4 catalyst.

8. The method for preparing a catalyst for methane and carbon dioxide dry reforming according to claim 7, wherein: The dried product is placed in a calcination device, heated to 300° C. to 600° C., calcined at the temperature, and slowly cooled to room temperature after calcination to obtain the Ni-B / MgAl2O4 catalyst, comprising: The dried product is placed in a calcination device, heated to 300° C. to 600° C. at a heating rate of 1° C. / min to 8° C. / min, calcined at this temperature for 2 to 6 hours, and slowly cooled to room temperature after calcination to obtain the Ni-B / MgAl 2 O 4 catalyst.

9. The catalyst prepared by the method for preparing a catalyst for methane and carbon dioxide dry reforming reaction according to any one of claims 1 to 8.

10. Use of the catalyst preparation method for methane and carbon dioxide dry reforming reaction according to any one of claims 1 to 8 in catalyst preparation.

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